<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="button" value="按钮" onclick="f1()">


<script>
    //1.无参无返回值
    function f1(){
        console.log("f1");
    }
    //调用
    f1();
//2.有参无返回值
    function f2(name,age){
        console.log(name+":"+age);

    }
    f2("元歌",10000000200000)
    //3.无参有返回值
    function f3(){
        return "我不是返回值";
    }
    let info = f3();
    console.log(info);
    //4.有参有返回值
    function f4(x,y){
        return x*y;
    }
    let result = f4(8,9);
    console.log(result);
    //第二种声明方法的方式
    let f5= function (name,age){
        console.log(name+":"+age);
    }
    f5("辣鸡英雄公孙离",88)
    //第三种声明方法的方式
    let f6 = new Function("name","age","console.log(name+':'+age)");
    f6("镜",22);
</script>
</body>
</html>